ATMOSPHERIC COMPOSITION; AURORAL ZONES; GAS TRANSPORT; MERIDIONAL FLOW; NITROGEN ATOMS; THERMOSPHERE; ATMOSPHERIC MODELS; AURORAL IONIZATION; EMISSION SPECTRA; ENERGY LEVELS; EXPLORER 55 SATELLITE; LIGHT EMISSION; NITRIC OXIDE; TIME DEPENDENCE; TWO DIMENSIONAL MODELS
Abstract :
[en] A time-dependent, two-dimensional model is developed for describing the meridional circulation of thermospheric odd nitrogen species produced in the auroral zone. The model is based on a previous model by Roble and Gary (1979) extended to upper altitude transport of the nitrogen species. Assumptions made include the existence of a steady neutral wind flowing from low to high latitudes, and an initial background due to scattered Lyman-beta and nightglow emissions. The aurora is also assumed as steady, along with a constant ion production. Predictions made using the model are compared with observations with the Atmosphere Explorer C spacecraft and rocket sounding measurements of the 5200 A distribution near the day-side polar cusp. The model requires thermospheric winds of 100-200 m/sec, flowing from day to nightside. Convective velocities near 1000 m/sec were detected by the Explorer spacecraft, as well as a day-to-nightside flow at the cusp.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Roble, R. G.; National Center for Atmospheric Research, Boulder, CO
Language :
English
Title :
Transport of aurorally produced N/2D/ by winds in the high latitude thermosphere
Publication date :
01 November 1982
Journal title :
Planetary and Space Science
ISSN :
0032-0633
Publisher :
Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom
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